Abstract

The chloromethyl group (—CH₂Cl) attached to a normal hydrocarbon chain gives rise to two characteristic Raman bands near 660 and 730 cm⁻¹ The band at 660 cm⁻¹, which is very intense, is assigned to a stretching mode of the C-Cl linkage when the chlorine atom is <i>trans</i> to a hydrogen atom. The less intense peak at 730 cm⁻¹ is assigned to the same mode of the rotational isomer with the chlorine atom <i>trans</i> to a carbon atom. These assignments are consistent with those reported in infrared studies. In contrast to almost equal intensities for both bands in the infrared, the band at 660 cm⁻¹ proved to be the strongest by far in Raman spectra.

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